... and then switches to his usual attire when the rep comes out and says they are next.

When Lois kisses Stewie's fork boo-boo, his bath water is still in the sink, but a second later when the shot cuts to Stewie's close up reaction, the water is gone.

Brian is barefoot when waiting on the stars at the party but he's suddenly wearing shoes when seen in the kitchen.
Also, his tail isn't sticking out of his pants, but is in the kitchen & the small decorcative feature on his vest has vanished once in the kitchen.

Comedian Joan Rivers (1933-2014) breaks down and says she's on camera “in her mind”, when Brian comments but ...

Brian: “Keanu Reeves, wow! I don't usually gush so you'll have to forgive me, but when I was writing Coast Guard, that's what I do, I'm a writer, anyway, when I was writing Coast Guard, I couldn't think of anyone other than... uh... there's a woodpecker on your head.”

American actor Keanu Reeves(1964-) is featured in this episode as being quite literally, as many critics see him, a wooden actor.

Peter: “Gee, I haven't been to California since I lived with my other family”

Peter's other family is none other than the “Manson Family”, the cult group who was lead by convicted murderer, Charles Manson(1934-).

The reference to Peter being invited to a party at American actress' Sharon Tate's (1943-1969) house is alluding to the fact Manson was convicted of conspiracy to commit the Sharon Tate/Leno and Rosemary LaBianca murders. His followers who actually committed the crimes are also serving life sentences.

Stewie tries to force a confession out of Muppets' character Kermit the Frog by attempting to seduce his long time swine companion, Miss Piggy

Former Walt Disney CEO Michael Eisner(1942-) is featured in this episode, complete with giving Brian personalized Mouse Ears.

Brian: “...and a copy of my can't-miss coming-of-age teen comedy set in Wisconsin”

Even though Brian's pushing a movie script this description bears a striking resemblance to the TV sitcom, “That 70's Show”(1998-2006) which of course, starred the voice of Meg, Mila Kunis(1983-)